King Rutilated Quartz Attachment (Barbell not included) 18Kt Yellow Gold 5 mm Gem Internally Threaded for 18G/16G ( 1 mm/ 1.2 mm) Thread not in gold Non-Sterile Vendor: Anatometal Fits Anatometal barbells in 18G/16G and fits internally threaded barbells in 18G/16G from all APP approved jewellery vendors (USA)